Pattern for cast-steel wheels



G. WALTHER.

PATTERN FOR CAST sTEEL WHEELS.

APPLICATION FILED MAR. 8, 1920.

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G. WALTHER.

PATTERN FOR CAST STEEL WHEELS.

APPLICATION FILED MAR. 8. I920.

Patented Aug. 22, T9 22.

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GEORGE 'WALTHER, 03? DATZTGN, UI-IIO, ASSIGNOR T9 THE DAYTON WHEEL FOUNDRY COMEANY, 0F DAYTON, JOE-X10, A CORPORATION OF OHIO.

.PA'ITER-N FOR CAST-STEEL WHEELS.

1 423 621, Specification of Letters Patent.

Application filed March 8,

To all whom it may concern Be it known that i, Gnonen VJALTHER, a citizen of the United States, residing at Dayton, in the count of Montgomery and State of Ohio, have invented certain new and useful Improvements in Patterns for Castfiteel W heels, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to improved patterns for cast steel wheels.

The object of the invention is to provide a master pattern for the rim and spokes and the main body portion of the hub for wheels in which these parts are standardized, and for using interchangeably in connection with the master pattern a plurality of hub extensions of variable shapes and dimen sions, whereby wheels of general standard type, as relating to the hub body, spokes and rim, but variable as to the hub extensions may be produced from one pattern, except as to the interchangeable hub extensions.

Patterns of this novel construction are in effect composite patterns, that is to say, the salient features of the steel wheels of a number of manufacturers, the wheels in the form here shown being designed for motor trucks, all of whom are obtaining their wheels from the same foundry, have been harmonized and combined in a single standard construction, except as to the variations in the hubs which is provided for in the interchangeable feature of the pattern.

The patterns are adapted to the usual foundry practice of hand molding, but are especially adaptable for machine molding in which maximum production is of great importance.

It will be obvious that a very material saving in pattern cost will be made in the use of a standardized master pattern and interchangeable hubs. A much greater saving in cost is effected, however, in the use of standardized patterns. In machine molding, the master pattern remains constantly on the machine, the change from one hub to another being made in a few minutes without materially interrupting continuous production.

This new practice is a marked improvement over the common practice of providing a complete pattern for each type of wheel, however slight the variations between diiferent wheels may be, or the alternative Patented Aug. F 52 35.922.

1920. Serial No. 363,941.

common practice of using a master pattern and pattern inserts which require the re turn of the master pattern to the pattern shop, thus requiring demounting and remounting of the pattern on the molding machine to effect the change in production from one type of wheel to another. In the old practice hours of time are required to change production from one type of wheel to another with a corresponding decreased output and increased cost of production. In the new practice there is practically no lost time involved in changing from one wheel to another with the result that output is materially increased and cost is accordingly decreased.

The new practice in molding made possible by the present invention involves a novel construction and a new process of molding and casting which are the subject of separate applications viz Serial No. 334,450, filed October 30, 1919, and Serial No. 338,556, filed November 17 1919.

I comprehend within my claims the invention broadly as it is fundamental in the molding art.

In the drawings:

Fig. 1 is a detail in cross section of the master pattern;

Fig. 2 is a detail of the hub of the master pattern having an interchangeable hub extension secured thereto.

Fig. 3 is a similar view to Fig. 2 showing a hub extension differing in size and shape to that shown in Fig. 2 applied to the master pattern.

Fig. i is a detail view of a hub extension detached.

It will be understood, of course, that the interchangeable hub extensions may be applied with equal facility on either or both sides of the master pattern. The construction, however, on the opposite sides of the pattern are identical as to principle, varying only as to shapes and dimensions, and will be describechtherefore, as applied to one side of the pattern only.

As here shown the master pattern consists of the main hub 1, spokes, 2, and rim 3, which may be of any suitable construction.

The hub of the master pattern has a depression formed therein, the bottom 4: of the depression being flat and the edge 5 inclined outwardly as here shown to form a sultable seat and match tit for the detachable hubs,

the juncture between the parts being made preferably above the sand parting line of the pattern. I

The detachable hub extensions 7 are somewhat larger in diameter at their base than through the body and are provided at the base with an inclined or beveled edge 8 of required dimensions to fit into the beveled edge 5 of the depression in the master pattern hub. The parting line between the detachable and the master hub comes, as here shown, on the wide curve oi? the hub taken as a whole, thus a convenient and satisfactory fit between the parts will be made, the inclined edges of the depression in the master hub acting to center and seat the detachable hub in the depression.

The detachable hubs may be secured to the master hub in any suitable manner. As here shown, the detachable hubs have a plurality of bolt or screw holes 9, extending therethrough, and the master hub has a corresponding plurality of threaded holes 10, in alignment with the holes 9, provided therein. Threaded bolts 11 are inserted through the holes 9 and screwed into the holes 10 to firmly secure the parts together. The holes 9 may be counter-sunk their outer edges and the bolts 11 provided with suitable heads to cause the head of. the bolts to come flush with the surface of the hub when the bolts are drawn down.

It will be understood that bolts of equal diameter will be used in all the detachable hubs, but that the same will be varied as to length to accommodate the variable lengths of the hub extensions.

The details relative to assembling the hubs may, of course, be variously modified, it being the purpose to here show and de scribe one form of preferred construction for illustrative purposes only. In the form here shown both the master pattern and the detachable hubs may be either wood or metal, 7

Having thus fully described. my invention, what I claim as new and desire to se- 'cure by Letters Patent, is

1. In a composite pattern for a cast steel Wheel, the combination of a master pattern,

consisting of spokes, a rim and a hub body, a circular depression h ving an outwardly inclined edge formed in the master hub body, a detachable hub extension having beveled bases adapted to fit the depression in the master hub body, and means to secure said parts together.

52. In a composite pattern for a cast steel wheel, the combination of a master pattern, consisting of spolrcs, a rim and a hub body, a joint surface intersecting the curve of the hub taken as a whole provided relative to the master hub, a detachable hub extension having joint surfaces of equal. dimensions adapted to form a junction with the corresponding surface of the master hub, and means for securin said parts together.

3. In a composite pattern for cast steel wheels, the combination of a master pattern consisting of spokes, a rim and a hub body, a joint surface provided in the master hub and having means to center and seata hub extension relative thereto, a detachable hub extension adapted to fit the depression of the master hub, and meansfor securing said parts together.

4. In a composite pattern for a cast steel wheel, the combination of a master pattern consisting of spokes, a rim and a hub body,

' a joint surface provided in the master hub above the sand-partin line ot the pattern, a detachable hub extension adapted to fit the depression of the master hub, and means to secure said parts together.

5. In a composite pattern for a cast steel wheel, the combination of a master pattern, consisting of spokes, a rim and a hub body, a circular depression having an outwardly inclined edge formed in the master hub, a detachable hub extension having beveled bases adapted to fit the depression in the master hub, and bolts extending through the hub extension having their heads substantially flush with the surface thereof, and screwed into the master hub to secure said parts together.

In testimony whereof, I affix my signa ture.

GEORGE WALTHER. 

